Cant stop building deterioration

[SS454 0]

My downtown city fluxuates constantly with the RCI demand. One minute it will have the bars up for CO$$ and CO$$$ and then the next minute it'll be way down in demand for the same things. This is the same situation for R$$ and R$$$. Also a lot of buildings keep deteriorating, and even when the R$$$ or CO$$$ demand goes up, it doesnt make the buildings normal, it just builds another building and deteriorates another. So how do I get the buildings to look normal and keep the RCI demands stable, without cheating?

Just to note, my crime rate is pretty low (around 16-18 on average), Commute times I've improved to about 20, Education is around 160, working a lot on enviorment has my air pollution down to under 80, garbage is gone (even though it shows 600 tons), there are plenty of smaller parks and an increasing amount of greenery/trees. Even going to the lenghts of deleting some of the deteriorated buildings in hopes it'll increase the RCI demand. So far not much result. Any help would be great, thanks.

[Cleaner475 150]

Its natural for some buildings to deteroirate perhaps if you could provide some pics to show how bad it is and then we could help.

[schm0 27]

Yes, more information would be nice. Most importantly, what other cities on your borders are flourishing? Your Sims could be leaving the city for greener pastures, or what they believe are greener pastures. Also, make sure you satisfy whatever they seem to be demanding as far as zones are concerned. If they need jobs, provide them there or in a nearby city. I've found the two most common problems with building deterioration are commute times and RCI demand being supplied elsewhere. Higher educated Sims need higher paying jobs, so they'll look for C$$, C$$$ or I$$$ jobs somewhere else if they're not readily available. They also won't use mass transit as much as poorer Sims. More information, a couple screenies and some more in depth explanation would be helpful.

[SS454 0]

Neighboring cities has one which is primarily residential, over 300,000 people, and the other city is a smaller map which is primarily commercial. Those cities dont have issues with deteriorating buildings.

Theres tons of CO$$$ jobs in the downtown, but they've all downgraded to CO$$, even though the commute times and educations are quite high. Mayor rating is 100% too.

[schm0 27]

Sometimes Sims just want something to do. I believe in one of the tutorials on the Omnibus this phenomenon is discussed. When this happens, it is suggested that you purposefully degrade your city and build a new central area in an adjacent city to provide a "new haven" for your Sims to flock to. Once this area thrives, slowly build up the original city and provide services to it and bring new vitality to it. That would be my suggestion. How is pollution in your city? Are you using any traffic mods? Perhaps noise pollution or air pollution are causing this to happen. Also, what kind of Sims are moving in to your city? Have you built any new zones here recently?

[SS454 0]

Air pollution is now below 80 on the line graph, roughly 50% overall on the mayor rating bars. Continiously trying to improve that, but I dont think its too bad considering the density. I do have an old version of NAM installed, and oddly they still wont use the freeway that is running through the middle.

I have only made a few new zones, but mainly been destroying buildings and adding parks and recreation. I have a lot of parks, including downloaded ones that are supposed to have good landmark effects and increase desirability, but they dont seem to improve the surrounding buildings.

When residential demand pops up, its always R$$ and R$$$.

[SS454 0]

The most recient view of the city, closer picture too.

There is something wrong with your URL.  I could not access this image. 

Please edit the image, so we can all enjoy it.  Thanks.  NOB.